Thanks! It looks like the drive failed (probably offline) and then during reboot the assembly generated a goofy setup?
I was a little hesitant about commands that would overwrite the raid configuration. But for future note I did run:
mdadm --stop /dev/md0
mdadm --assemble /dev/md0 /dev/sd[bde]
mdadm --run /dev/md0
(I would note I probably didn't need this command if I had run the assembly command with the '--force' option)
This got the RAID array back up in a "clean, degraded" state. After mounting it in the webUI, I was able to access the shared files systems again. The RAID and File System are persistent through reboot. (I'm going to assume the persistence is due to the failed hard drive no longer being in the array)
Waiting on a replacement drive, but glad I don't have to go through and restore the data from the original locations. I think there are plenty resources to add a replacement drive to a degraded RAID. Again thanks for the help!